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A007236 Compressibility of hard-hexagon lattice gas model.
(Formerly M4357)
3
1, -7, 18, -24, 24, 6, 66, 258, 1014, 3906, 14760, 54696, 198510, 704010, 2431110, 8130096, 26103624, 79292226, 221534442, 532863372, 870102906, -842584128, -17420140980, -111985825752, -559952980782, -2460921694668, -9861404819574, -36339628229910 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=0..27.

Sean A. Irvine, Java program (github).

G. S. Joyce, Exact results for the activity and thermal compressibility of the hard-hexagon model, J. Phys. A 21 (1988), L983-L988.

CROSSREFS

Sequence in context: A256011 A272972 A070609 * A056021 A090098 A101865

Adjacent sequences:  A007233 A007234 A007235 * A007237 A007238 A007239

KEYWORD

sign

AUTHOR

Simon Plouffe

EXTENSIONS

More terms from Sean A. Irvine, Nov 19 2019

STATUS

approved

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Last modified May 26 22:58 EDT 2020. Contains 334634 sequences. (Running on oeis4.)